
linearizes the Abel map
\(\underline{A}_{Q_0}(\mathcal {D}_{\hat{\tilde{\mu }}_0(\tilde{x},\tilde{t}_r)\underline{\hat{\tilde{\mu }}}(\tilde{x},\tilde{t}_r)})\) ,
\(\tilde{\mu }_j(\tilde{x},\tilde{t}_r)=\mu _j(x,t_r)\) , \(j=0,\ldots ,n\) .
The intricate relation between the variables \((x,t_r)\)  and
\((\tilde{x},\tilde{t}_r)\)  is detailed in (REF ).
Our approach follows a route similar to Gesztesy and Holden's
treatment of the CH hierarchy [1]}.
